Question
Look at the following heating curve to answer the question.
Temperature (^oC):
-50
0
50
100
150
Heat added(J/g):
0
10
20
30
What does the straight line in between the inclines represent?
Temperature (^oC):
-50
0
50
100
150
Heat added(J/g):
0
10
20
30
What does the straight line in between the inclines represent?
Answers
GPT-4o mini
In a heating curve, straight lines typically represent phase changes, while inclined lines indicate temperature changes within a specific phase (solid, liquid, or gas).
In the heating curve you've described, the straight line between the inclines represents a phase change where the substance is undergoing melting or boiling. Given the temperature ranges provided (e.g., moving from solid at lower temperatures to liquid and eventually to gas), the straight lines indicate points where the substance is transitioning from one phase to another:
- If the straight line is at 0 °C, it would represent the melting of ice (solid to liquid).
- If the straight line is at 100 °C, it would represent the boiling of water (liquid to gas).
So, the straight lines correspond to the points where heat is added without a change in temperature, which occurs during phase transitions.
In the heating curve you've described, the straight line between the inclines represents a phase change where the substance is undergoing melting or boiling. Given the temperature ranges provided (e.g., moving from solid at lower temperatures to liquid and eventually to gas), the straight lines indicate points where the substance is transitioning from one phase to another:
- If the straight line is at 0 °C, it would represent the melting of ice (solid to liquid).
- If the straight line is at 100 °C, it would represent the boiling of water (liquid to gas).
So, the straight lines correspond to the points where heat is added without a change in temperature, which occurs during phase transitions.